What is tcllib?

Tcllib is a collection of utility modules for Tcl. These modules
provide a wide variety of functionality, from implementations of
standard data structures to implementations of common networking
protocols. The intent is to collect commonly used function into a
single library, which users can rely on to be available and
stable.

What modules are in tcllib?

The latest version of tcllib, 1.17, includes the following
modules, and much more: